The final resting place for the remains of 143 Habsburg royalty.

The beautiful baroque library of the Hapsburg empire.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

"Dallas’s pretty much only carnivorous plant gallery."

A Nesting Doll of Churches.

David Sedaris called it "The greatest shop in the world."

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

One of the largest caves in the world open to the public.

Architectureal fantasy quarter of Rome.

Ever hear of the Milazzo Cage?

The astonishing collection of an infamous criminologist.

The underground sanctuary of a mysterious ancient cult.

The glowing blue Nymphaeum of Emperor Tiberius.

Medieval torture techniques with a modern conscience.

Abandoned village in Sicily built during the agricultural reforms of Mussolini.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

An Italian hillside ghost town.

Abandoned medieval hill town.

An eccentric home in Sicily turns heads on a regular basis.

Abandoned cemetery of the former Psychiatric Hospital of Volterra.

Largest necropolis in the Mediterranean.

Jesus' footprints and the first catacombs in the world.

Southern Italy's spinning top village.